Depends lah,i feel is wat car u drive, if u drive & go tune
up... er...mayb lik my friend S15 spec-C, he cannot really lonch
cos he never fix the lonch control thing(dunno real name for this
gadget).....& his tires spin even at 19" at pick-up when i play
wid him...always "tiak" him 1/4 car den he suddenly pass me
liao...... 
i myself if wan to pick-up faster... pull hand-break,find biting
point of clutch, den rev to 2.5 to 2.8k on RPM, den release
hand-break,den FLOOR acc...lolx...of cos u must get tires tat hv
grip lah, if not,it wil spin & spin...or mayb get a REX cos 4WD
mah...
End of te dayhehe, must get tires tat hv grip, i feel/tink
SO-2.....cos use b4...hehehe
practice lonching til u get the most out of it & try not to let
ur wheels spin too much,..
if can........ (skid & Grip & go) is
better den (spin & grip den go)..cos MAYB after spinning for a
while,mayb ur RPM reach 5k liao, gonna change gear soon as distance
travelled is not far as wheel is spinning..lik tat can understand
hor.. 
Ya..also if can, change racing clutch>those got "kliang kling
kling" sound,fly-wheel will be better cos the power is transmitted
to the drive train mah....as to minimize loss...Tink is lik tat
ba...do correct me if i'm wrong.. 